When a driver is using the trailer hand brake valve to stop a rig and then stomps on the treadle valve, what is the source of the trailer service control signal?
A. tractor primary circuit
B. tractor secondary circuit
C. trailer reservoirs
D. trailer hold-off circuit
Answer: A
You might also like to view...
?Dermal exposure to plastics is one in which plastics or their vapors are ____.
A. ?in contact with eyes B. ?ingested C. ?inhaled D. ?in contact with the skin
Small engines require an outside source of power
Indicate whether the statement is true or false
Speaking only in acronyms, the NPA, the NXX, and the XXXX are all codes utilized by the ________
Fill in the blank(s) with correct word
Which of the following indicates a problem when checking the primary controls?
A. resistance and free play in the clutch B. free play or lash in the steering wheel C. looseness in the gas or brake pedals D. free shifting from neutral into other gears